Gas burner



`Ian. 29, 1929.

J. H. GRAYsoN GAS BURNER Filed Aug. 4, 1924 Patented `lan. 29A, 1929.

UNITED STATES l 1,700,199 PATENT OFFICE.

TOEN H. GRAYSON, OF ATHENS, OHIO, ASSIGNOR TO THE J'. H. GRAYSON MANUFG-TUBING COMPANY, OF ATHENS, OHIO, .A CORPORATION OF OHIO.

' GAS BURNER.

Application mea August 4, 1924. serial no. 730,059.

This invention relates to gas burners, and particularly to a burnermanifold for use in 'gas heaters of the radiant type.

When gas heaters of the radiant type are provided with iues for carryingoff the products of combustion, incomplete combustion will reduce theeliiciency of the heater but will not ordinarily result in the dischargeinto the room of asphyxiating gases. With all 1o pirtable heaters,however, and with many ed heaters, the products of combustion aredischarged into the room, and safety from asphyxiation requires thatcomplete combustion take place under all conditions of fuel supply whichmay be encountered in a given loca ity. 'In some localities the pressureand B. t, u. content of the gas may vary from time to time, but whetheror not these properties of the gas vary, the heating of the burnermanifold affects the operation of a heater by causing a materialreduction in the air-gas ratio. An object of the invention is to providea gas burner manifold which will give a lower reduction in the air-gasratio than can be obtained with present day constructions. A furtherobject of the invention is to provide a gas burner manifold which iscooled by secondary air su plied to the heater.

Theseand ot er objects of my invention are attained by the embodiment ofmy invention which is illustrated in the accompanying drawings in which,

Fi 1 is an elevation, partly in central 1ongitu inal section" of aburner manifold constructed in accordance with my invention;

Fig. 2 is an end elevation of the manifold; and v Fig. 3 is an elevationsimilar to Fig. 2, but showlngassociated portions of the heater invertical section.

In the drawings, which illustrate a three i tube burner manifold, thetubes which are designated by the numeral 1 discharge intoA thehorizontal passage 2, with which the burner tip openings 3 communicate.The

combustible mixture manifold is provided with the usual lugs 4 forattachment to the body of the heater and with depending lugs 5 whichcarry the gas supply manifold 6.

The gas manifold is provided with threaded openings 7 in alignment withthe tubes 1 for receiving the usual nozzles. e

The construction, so far as described above,

may be considered as typical of present day practice. The manifold is ofcourse heated ed air which mixes with the flame and hot by the liamesissuing from the burner tips and by radiation from the incandescentglowers. To keep the temperature of the burner manifold as lowl aspossible, I provide a plurality of heat dissipating tins 8 which extendaround the sides and bottom of the passa e 2. The fins are preferablytapered towarfgls their outer edges and are joined, at their bottomedges, by longitudinal fins 9, which extend between the tubes 1 andproject from the end faces of the outer tubes.

` A burner manifold of this lconstruction is particularly eliicient whenused in connection with the heater described in my copendingapplication, Ser. N o. 698,552, filed March 11, 1924. As shown in Fig.3, the supportin plate l0 is provided with openings 1l whic communicatewith recesses 12 in the lirebrick 13 to permit the passage of secondaryair in large quantities between the irebrick and the glower 14.Secondary air also enters the base of the glower through the spacebetween the top of the manifold and the plate 10. With this constructiona large quantity of air passes over the fins of the manifold, and thepreliminar heating of the secondary air reduces .the anger ofchillingthe flame which wouldresult in a lowering of the flametemperature. The path of the air which cools the manifold, and whichwhen heated, serves as a supply of secondary air is indicated by thearrows in Fig. 3

The dissipation of heat keeps the burner tips cool and preventspremature ignition of the fuel mixture. The cooling of the entiremanifold and Bunsen tubes results in a higher primary air injection thanis attained with the usual constructions. Combustion is further assistedby the large quantity of heat` gases but which does not chilly the same.Itis, therefore, apparent that both the direct and the secondary effectsproduced by the cooling ins on the burner manifold are ofassi'stance insecuring complete combustion.

Itis to be understood that the invent'on is not limited to the specilicembodiment herein shown and described, as many changes in the parts,their relative size, shape, position and location may be made withoutdeparting from the spirit of myinvention.

I claim:

1. A burner manifold for use in a radiant heater comprising a pluralityof Bunsen tubes, walls defining a horizontal passage at u the tops ofand communicating with each of said tubes, means on the top wall of saidpassage for receiving burner tips, and air coolin fins on the walls ofsaid passage and sai tubes.

2. The invention as claimed in claim 1, wherein the ns on the walls ofsaid passage 'comprise vertical fins extending around the side andbottom walls of said passage.

3. vA burner manifold for use in a radiant heater, said manifoldcomprising a horizontally arranged gas supply conduit having a pluralityof threaded openings in the upper wall thereof for receiving nozzles,Bunsen tubes arranged over said openings and with their lower endsspaced from said conduit, walls deining a horizontal passage at the topsof and communicating with each of said tubes, and air cooling fins onthe walls of said passage and on said tubes, the fins on said tubesbeing arranged below the fins on said passage and merging into the loweredges thereof.

4. Ina radiant heater, an apertured plate for supporting a plurality ofglowers and a firebrick, a burner manifold supported below said plateand comprising walls defining a horizontal passage positioned below theapertures of said plate, burner tip openings extending above saidpassage to deliver .a combustible mixture through said apertures, a"

plurality of Bunsen tubes for delivering the combustible `mixture tosaid passage, a gas conduit for projecting a stream of gas 1nto each ofsald tubes, and means on sa1d manifold y,for reducing variations in theair-gas rat-io'of the combustible mi-xtures, said means comprisingaircooling fins on the walls of said passage.

In testimony whereof, I ailix my signature.

JOHN H. GRAYsoN.

